Currently, Chongqing built many underground railway, there are many underground subway, as established in the ground, so reducing the footprint and noise of the city, which is one of the famous reasons
At present, Chongqing has built many underground railways, and there are many underground subways, because it is built underground, so it reduces the city's floor space and noise, which is one of the reasons why it is famous.
At present, Chongqing has built many underground railways and many underground subways. Because they are built underground, they reduce the floor area and noise of the city, which is one of the famous reasons